CN207612056U - A kind of failure current limit equipment - Google Patents
A kind of failure current limit equipment Download PDFInfo
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- CN207612056U CN207612056U CN201721799687.5U CN201721799687U CN207612056U CN 207612056 U CN207612056 U CN 207612056U CN 201721799687 U CN201721799687 U CN 201721799687U CN 207612056 U CN207612056 U CN 207612056U
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- reactor
- current limit
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Abstract
The utility model proposes a kind of failure current limit equipment, failure current limit equipment includes series transformer, at least one high-speed switch and at least one reactor.The both ends series connection line attachment of series transformer side winding, other side winding both ends connect a reactor or a reactor group, each reactor are connected in parallel with a high-speed switch.When circuit is run, close a floodgate the high-speed switch in parallel with reactor, and in line failure, reactor is accessed circuit by the rapid high-speed switch that disconnects, and is limited line current.The utility model device effectively limits the short circuit current of system by indirectly putting into current limliting module, and the drop-out current of high-speed switch is small, and the voltage class of current limliting branch is low, improves the reliability of current limiter.
Description
Technical field
The utility model is related to a kind of failure current limit equipment.
Background technology
With the expansion of power system capacity and scale, the level of short-circuit fault of power system electric current is also continuously improved, short
Road failure is also increasing to the destructiveness of electric system and coupled electrical equipment.Fault current limiter is detecting short circuit
After failure occurs, by quickly changing the impedance parameter of faulty line, short circuit current is limited in low-level, to protect electric power to set
It is standby, meet existing breaker and cuts off short trouble under the premise of no more than its breaking capacity.
Current published fault current limiter has resonant mode fault current limiter, solid-state fault current limiter and super-conductive fault current limliting
Device etc. is direct-on-line road installation current limiter, exits the bypass of the equipment of current limliting in system normal operation, in system
Current limiter is put into when failure.It is substantially high-voltage system to need the AC system of current limliting in failure at present, and current limliting is set
For when being directly installed on certain circuit of high-voltage system, the fault current that current limiter is born is larger, current limiter phase
The section breaker or device answered electric current in disjunction are also larger, affect the reliability of equipment, need a kind of safer, reliable
Failure current limit equipment.
Utility model content
The purpose of this utility model, is to provide that a kind of reliability is high and failure current limit equipment suitable for engineer application,
The solution of the utility model is：
A kind of failure current limit equipment is provided, the failure current limit equipment includes series transformer, at least one high-speed switch
And at least one reactor；The both ends series connection line attachment of series transformer side winding, other side winding both ends connect
Connect at least one reactor；The reactor is connected in parallel at least one high-speed switch；
When the quantity of the reactor is more than or equal to two, the reactor is connected in series with.
Further, the high-speed switch is mechanical switch or the switch being made of power electronic equipment.
Further, the reactor shunt capacitance, combination form impedance unit；The impedance unit with it is described quickly
Switch in parallel connects.
Further, the both ends of above-mentioned series transformer tie-in line trackside winding connect at least one bypass equipment.
Further, above-mentioned bypass equipment is mechanical bypass switch or the by-pass switch being made of power electronic equipment.
Further, wherein one end of above-mentioned series transformer tie-in line trackside winding is set by breaker and the bypass
Standby one end connection, the other end are connect by isolation switch with the bypass equipment；Alternatively, the series transformer line attachment
The both ends of side winding are connect by breaker with the both ends of the bypass equipment respectively.
Further, the both ends of at least side winding of above-mentioned series transformer at least one overvoltage protection in parallel is set
It is standby.
Further, above-mentioned overvoltage protective device includes arrester and spark gap.
The utility model also provides a kind of failure current limit equipment, and the failure current limit equipment includes series transformer, a N
A high-speed switch and N number of reactor, N is natural number, and N is more than 1；N number of reactor respectively with N number of high-speed switch simultaneously
Connection connection, each reactor are connected in parallel with a high-speed switch, are constituted a current limliting module, are constituted N number of current limliting module altogether.
Further, the failure current limit equipment further includes N number of capacitance, N number of reactor respectively with N number of capacitance
It is connected in parallel, each reactor is in parallel with a capacitance, constitutes an impedance unit, constitutes N number of impedance unit altogether；The N
A impedance unit is connected in parallel with N number of high-speed switch respectively, and each impedance unit is connected in parallel with a high-speed switch, structure
At a current limliting module, N number of current limliting module is constituted altogether.
N number of current limliting module, which is sequentially connected in series, constitutes current limliting module group；The two of series transformer side winding
End series connection line attachment, other side winding both ends connect the current limliting module group.
After adopting the above scheme, the utility model can be held to avoid failure current limit equipment mounted on voltage levels system
The high voltage and high current received improve the reliability and economy of failure current limit equipment；When using multiple current limliting block coupled in series
When, different grades of current limliting can be carried out according to the severity of the system failure, and after partial throttle module failure, do not influence it
Its malfunctioning module operation, further improves the utilization rate and reliability of failure current limit equipment；Further, it is also possible to be transported in stable state
When row, only input partial throttle module, the trend of regulating system, economic benefit are more obvious.
Description of the drawings
Fig. 1 is the failure current limit equipment of the utility model one embodiment；
Fig. 2 is the failure current limit equipment of second embodiment of the utility model；
Fig. 3 is the failure current limit equipment of the utility model third embodiment；
Fig. 4 is the failure current limit equipment of the 4th embodiment of the utility model；
Fig. 5 is the failure current limit equipment of the 5th embodiment of the utility model；
Wherein：1- series transformers, 2- high-speed switches, 3- reactors, 4- bypass equipments, 5- capacitances, 6- overvoltage protections
Equipment, 7- current limliting modules, 8- current limliting module groups, 9- impedance units.
Specific implementation mode
Specific embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
The utility model proposes a kind of failure current limit equipment and its control methods, one preferably implements such as Fig. 1 institutes
Show.The failure current limit equipment includes 1, high-speed switch 2 of a series transformer and a reactor 3；Series-transformer
The both ends series connection line attachment of 1 side winding of device, other side winding both ends connect a reactor 3；Reactor 3 and high-speed switch
2 are connected in parallel；High-speed switch 2 is mechanical switch or the switch being made of power electronic equipment.
Control method is accordingly：When AC system normal operation, the high-speed switch in parallel with reactor remains closed
State；When circuit or circuit proximal end generation catastrophe failure, detect that the electric current for flowing through the failure current limit equipment line attachment is big
In predetermined current threshold and the duration is more than preset time, disconnects the high-speed switch in parallel with reactor.
The utility model proposes a kind of failure current limit equipment second preferred embodiment as shown in Fig. 2, series-transformer
The both ends of the winding of 1 line attachment of device connect a bypass equipment 4；Bypass equipment 4 is for mechanical bypass switch or by electric power electricity
The by-pass switch that sub- equipment is constituted, bypass equipment 4 is mainly used for failure current limit equipment is out of service.Series transformer 2 accesses
Wherein one end of line side winding is connect by breaker with one end of bypass equipment 4, the other end by isolation switch with it is described
Bypass equipment 4 connects；Alternatively, the both ends of 1 tie-in line trackside winding of series transformer are set by breaker and the bypass respectively
Standby 4 both ends connect；In failure current limit equipment fault or maintenance, by disconnecting the breaker by failure current limit equipment
Isolation.In general, breaker both ends can be furnished with isolation switch and grounding switch.
The utility model proposes a kind of failure current limit equipment third preferred embodiment as shown in figure 3, reactor 3 simultaneously
Join a capacitance 5, combination is connected in parallel with the high-speed switch 2 again after forming an impedance unit.
In the both ends of 1 tie-in line trackside winding of series transformer at least one overvoltage protective device 6 in parallel, the mistake
Voltage protecting apparatus 6 includes arrester and spark gap；Alternatively, overvoltage protective device 6, which is connected in parallel on series transformer 1, connects electricity
The both ends of anti-device side winding；Alternatively, 1 both sides winding of series transformer overvoltage protective device 6 all in parallel.
The utility model proposes a kind of failure current limit equipment the 4th preferred embodiment it is as shown in Figure 4.Failure current limit
Equipment includes a series transformer 1, N number of high-speed switch 2 and N number of reactor 3, and N is natural number, and N is more than 1；N number of electricity
Anti- device 3 is connected in parallel with N number of high-speed switch 2 respectively, and each reactor 3 is connected in parallel with a high-speed switch 2, constitutes one
A current limliting module 7 constitutes altogether N number of current limliting module 7；N number of current limliting module 7, which is sequentially connected in series, constitutes current limliting module group 8；Series connection
The both ends series connection line attachment of 1 side winding of transformer, other side winding both ends connect above-mentioned current limliting module group 8；Series-transformer
The both ends of 1 tie-in line trackside winding of device connect a bypass equipment 4, and bypass equipment 4 is mainly used for exiting failure current limit equipment
Operation.
Alternatively, the 5th embodiment as shown in Figure 5, failure current limit equipment further includes N number of capacitance 5, and N number of reactor 3 divides
It is not connected in parallel with N number of capacitance 5, each reactor 3 is in parallel with a capacitance 5, constitutes an impedance unit 9, altogether structure
At N number of impedance unit 9；N number of impedance unit 9 is connected in parallel with N number of high-speed switch 2 respectively, each impedance unit 9 with
One high-speed switch 2 is connected in parallel, and is constituted a current limliting module 7, is constituted N number of current limliting module 7 altogether；
Embodiment 4 and 5 corresponding control method of embodiment are：M predetermined current threshold is set, described in detecting and flowing through
The electric current of failure current limit equipment line attachment is more than m-th of predetermined current threshold and the duration is more than m-th of preset time,
The high-speed switch 2 of m current limliting module 7 in N number of current limliting module 7 is then disconnected, m is natural number, and m is less than or equal to N.
It should be noted that each element in the utility model, such as reactor, resistance, switch, refer to equivalent member mostly
Part；That is, equivalence element in circuit structure is either single element, can also be multiple same elements cascades
(series, parallel etc.) forms.For any equivalence element in the utility model embodiment, any of said function can be realized
Equivalent circuit should all be covered within the protection domain of the utility model embodiment.
Finally it should be noted that：Only illustrate the technical solution of the utility model in conjunction with above-described embodiment rather than it is limited
System.Those of ordinary skills in the art should understand that：Those skilled in the art can be to the specific implementation of the utility model
Mode is modified or replaced equivalently, but these modifications or change are being applied within pending patent requirements protection domain.
Claims (10)
1. a kind of failure current limit equipment, it is characterised in that：
The failure current limit equipment includes series transformer, at least one high-speed switch and at least one reactor；The string
Join the both ends series connection line attachment of transformer side winding, other side winding both ends connect at least one reactor；The reactance
Device is connected in parallel at least one high-speed switch；
When the quantity of the reactor is more than or equal to two, the reactor is connected in series with.
2. a kind of failure current limit equipment as described in claim 1, it is characterised in that：The high-speed switch be mechanical switch or
The switch being made of power electronic equipment.
3. a kind of failure current limit equipment as described in claim 1, it is characterised in that：
The reactor shunt capacitance, combination form impedance unit；The impedance unit is connected in parallel with the high-speed switch.
4. a kind of failure current limit equipment as described in claim 1, it is characterised in that：
The both ends of the series transformer tie-in line trackside winding connect at least one bypass equipment.
5. a kind of failure current limit equipment as claimed in claim 4, it is characterised in that：
The bypass equipment is mechanical bypass switch or the by-pass switch being made of power electronic equipment.
6. a kind of failure current limit equipment as claimed in claim 4, it is characterised in that：The series transformer tie-in line trackside around
Wherein one end of group is connect by breaker with one end of the bypass equipment, and the other end is set by isolation switch and the bypass
Standby connection；Alternatively, the both ends of the series transformer tie-in line trackside winding pass through breaker and the bypass equipment respectively
Both ends connect.
7. a kind of failure current limit equipment as described in claim 1, it is characterised in that：At least side of the series transformer around
The both ends of group at least one overvoltage protective device in parallel.
8. a kind of failure current limit equipment as claimed in claim 7, it is characterised in that：The overvoltage protective device includes lightning-arrest
Device and spark gap.
9. a kind of failure current limit equipment, it is characterised in that：
The failure current limit equipment includes a series transformer, N number of high-speed switch and N number of reactor, and N is natural number, and N is big
In 1；N number of reactor is connected in parallel with N number of high-speed switch respectively, and each reactor is in parallel with a high-speed switch to be connected
It connects, constitutes a current limliting module, constitute N number of current limliting module altogether；
N number of current limliting module, which is sequentially connected in series, constitutes current limliting module group；It goes here and there at the both ends of series transformer side winding
Join line attachment, other side winding both ends connect the current limliting module group.
10. a kind of failure current limit equipment as claimed in claim 9, it is characterised in that：The failure current limit equipment further includes N number of
Capacitance, N number of reactor are connected in parallel with N number of capacitance respectively, and each reactor is in parallel with a capacitance, constitute one
Impedance unit constitutes altogether N number of impedance unit；N number of impedance unit is connected in parallel with N number of high-speed switch respectively, often
A impedance unit is connected in parallel with a high-speed switch, is constituted a current limliting module, is constituted N number of current limliting module altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721799687.5U CN207612056U (en) | 2017-12-20 | 2017-12-20 | A kind of failure current limit equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721799687.5U CN207612056U (en) | 2017-12-20 | 2017-12-20 | A kind of failure current limit equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207612056U true CN207612056U (en) | 2018-07-13 |
Family
ID=62799263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721799687.5U Active CN207612056U (en) | 2017-12-20 | 2017-12-20 | A kind of failure current limit equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207612056U (en) |
-
2017
- 2017-12-20 CN CN201721799687.5U patent/CN207612056U/en active Active
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